Mopar OEM EFI
as far as I can tell, you can use the magnum v6 or v8 harnesses interchangeably, with the exception of adding an additional wires to the v6 harness for the v8. The computers are supposed to hook to any of the aforementioned harnesses. The only problem you may have is getting the trans working right, unless you get it out of the donor vehicle. You might want to make sure they get all the wiring goodies out from under the dash, too. ALSO.. if you wanted to make it work, the intrument cluster from a 93 Dakota will almost fit into the same place the one on my 72 dart is.. I think it could be done with some minor tweaking. That's just something to consider.
Also there are a lot of other EFI systems out there. From what I can tell, Megasquirt is good and you can find that on auto-nomics.com.. then there's Fastmanefi.com, another site called affordable-fuel-injection.com, let see... well there was customefis.com - but their account has been suspended, so that site must be a dud. Some of these sites offer more than just megasquirt, etc. check em out. One cool thing about them is that they are easier to modify for turbos, superchargers, etc than the factory MPFI.